SOLUTION: What is the probability of obtaining at least one head in 3 flips of a coin?

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Question 604816: What is the probability of obtaining at least one head in 3 flips of a coin?
Answer by Alan3354(69443) About Me  (Show Source):
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What is the probability of obtaining at least one head in 3 flips of a coin?
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At least one head = not all tails
Prob of all tails = (1/2)*(1/2)*(1/2) = 1/8
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1 - 1/8 = 7/8